Question: University of Pennsylvania painting collection is about which topic?
Paraphrase: What is the University of Pennsylvania's painting collection about?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P195 wd:Q49117 . ?sbj wdt:P31 wd:Q3305213 } 
Answer: The Agnew Clinic, The Last of the Mohicans: The Death of Cora, Portrait of Thomas W. Evans